PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-15:27:30
G01     77.4           33.0                8.6 +/-    0.45      14.2 +/-    0.45  0.060 / 0.110
G07     133.7          32.8               10.0 +/-    1.62      16.5 +/-    1.62  0.070 / 0.100
G11     56.8           31.6                8.5 +/-    0.65      14.4 +/-    0.65  0.060 / 0.110
G13     284.1          36.9                7.8 +/-    0.81      12.0 +/-    0.81  0.080 / 0.110
G15     310.5          12.1                6.6 +/-    1.59      17.7 +/-    1.59  0.060 / 0.110
G17     225.0          66.5                9.6 +/-    1.45      10.4 +/-    1.45  0.080 / 0.090
G19     220.2          38.6               10.0 +/-    1.57      14.9 +/-    1.57  0.030 / 0.030
G28     9.1            60.3                8.9 +/-    0.86      10.1 +/-    0.86  0.030 / 0.030
G30     125.7          69.9                9.9 +/-    0.75      10.5 +/-    0.75  0.040 / 0.050